Filter.



N0. 663,84l. Patented Dec. ll, I900. T. J. ZOELLER.

F ILTEB.

(Application filed Apr. 17, 1900.

' 4N0 Mode l.) 2 Sheets-Sheet 1.

- 1777162777 07 V4071 5% a? 0 v p (No Model.)

T. J..ZOELLER.

FILTER.

Patented Dec. ll, I900.

(Application filed Apr. 17, 1900.1

Z-Sheets-Sheet 2.

UNITED STATES l n'rnn'r Orrrcn.

THEODORE J ZOELLER, OF NASHVILLE, TENNESSEE.

FILTER.

SPECIFICATION forming part of Letters latent No. 663,841, dated December 11, 1900. 9 Application 'filed April 17, 1900- Serial Nol3,229- (No model.)

To all whom it may concern.-

Be it known that I, THEODORE J. ZOELLER, a citizen of the United States,residing at Nashville, in the county of Davidson, State of Tennessee, have invented certain new and useful Improvements in Filters; and I hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, in which Figure 1 is a longitudinal central section of the filter-casin g, showing the filtering-drums in elevation and the screen-drum, which incloses the filtering drums, partly broken away. Fig. 2 is an enlarged detail View, partly in section and partly in elevation, of some of the filtering-drums and the spools and gaskets or packings between the same, also portions of the tubular shaft which carries the filtering-drums and portions of the reticulated drum which incloses the filtering-drums.

Fig. 3 is an enlarged transverse central section of the filter on the line 3 3, Fig. 1. Fig. 4 is an end view of one of the spools which separate the filtering-disks. Fig. 5 is a view of the outer face or side of one of the filtering-drums. Fig. 6 is a view of the inner face or side of one of the filtering-disks, two of which constitute a filtering-drum. Fig. 7 is a view of the inner face or side of a modification of the filtering-disk shown in Fig. 6.

Like symbols refer to like parts wherever they occur.

My invention relates to the construction of that class of filters adapted to the filtration under pressure of large quantities of water or other fluid, and has for its several objects compactness and simplicity of construction, with extensive filtering-surface and facility of cleaning the filtering-surface from time to time as may be required.

To these ends one of the features of my invention embraces the combination, with a se ries of filtering-drums mounted on and communicating with a drainage or discharge tube, of an inclosing perforated or reticulated rotatable drum, adapted to carry a granular filtering or cleaning material, for tumbling the filtering-drums from time to time for the removal of deposit from the filtering-surfaces of said drums.

Another feature of my invention embraces a filtering-dru m comprised of two disks, each provided on one face with projections which when said faces of the disks are in apposition maintain a drainage-way between the disks for the passage of the filtered fluid to the drain age-tubes on which the drums are mounted, whereby a very thin filtering medium may be made to withstand a high pressure, and thereby an extensive filtering-surface and rapid filtration may be obtained within a limited compass.

There are other minor features of invention, all as will hereinafter appear.

I will now proceed to describe my invention more fully, so that others skilled in the art to which it appertains may apply the same.

In the drawings, A indicates the filter-casing, preferably of cylindrical form and having the heads B B each provided centrally with a stuifing-box b, through which project the ends of a drainage-tube or tubular shaft 0,

which carries a series of filtering-dru ms D within said casing A. The length and diameter of the casing A will be regulated by the diameter, thickness, and number of the filtering-drums to be employed, and the number of the drums will be determined by the volume of fiuid to be filtered within any given time and the character of the fluid to be filtered.

The inlet for the fiuid to be filtered is preferably located beneath the filtering-drums to facilitate the deposit of the heavier matter before the fiuid reaches the filtering-drums, and for said purpose the lower side of the casing is perforated along a longitudinal line, as at at a a, (see Figs. 1 and 8,) and to the exterior of the casing A and inclosing said perforations is riveted or otherwise secured the gutter, leader, or semicylindrical conduit a, with which at its center or other suitable point the supply-pipe A connects. In the upper part of the casing A is the flush-pipe A which may be provided with a suitable valve (not shown) for closing said pipe at all times except during the cleaning of the filtering-drums.

0 indicates the drainage-pipe for conduct.- ing off the filtered fluid, which pipe may be provided at its extremities with swiveled elbows O G or other suitable discharging devices, and as said drainage-pipe constitutes a shaft carrying the filtering-dru ms which are to be rotated from time to time it may also be provided with a hand-wheel if to be operated manually or with a gear-wheel C if the filter is of such size as to demand power for the rotation of the tubular shaftO and the filterdrums which it carries.

Within the casing A the drainage-pipe or tubular shaft 0 is perforated at intervals, as at c a, (see Fig. 2,) preferably in the form of elongated slots, and is provided with a fixed collar 0, threaded, as at 0 for the reception of a nut 0 and between the collar 0 and threaded portion 0 is provided with a spline or feather c, all for purposes which will hereinafter appear.

D D indicate the filtering-drums, mounted on and carried by the drainage-pipe or tubular' shaft C. These filtering-drums are each composed of two separate disks or sections d of like formation-that is to say, with a central opening at for the passage of the tubular drainage-shaft O, and a series of radial drainage-vents d one of which may receive the spline or feather c of said shaft, a circumferential flange d upon one face, and also upon said face a series of projections d, of substantially the height of said flange d which flange and projections maintain a channel for the filtered fluid between said disks dd when united to form a filtering-drum D. Preferably the projections d on the face of the filter-disk are in the form of teats or points '(see Fig. 6) and bearagainst each other when the'lik e faces of the disks (1 cl are in apposition; but, if desired, they may be in the form of transverse ribs, (see Fig. 7,) in which case they will be arranged at right angles orcrossing each other when like faces of the disks I by a suitable packing-ring, as at r, Fig. 5,

and are then forced or pressed within a suitable metallic band or ring R, which gasket and ring close the periphery of the filter-drum thus formed and so seal it that the fluid to be filtered can only reach the interior through the filter-disks.

The filter-disks (1 may be of any suitable porous material, but are preferably of dense hard-burned carbon of the character of material supplied the electrical trade, as the same possesses a certain amount of elasticity or flexibility which w ill prevent the cracking of thin plates under pressure, it being practically impossible to obtain perfectly fiat ii iter-plates. v

E indicates the spools used to separate or space the several filter-drums, said spools having a central opening for the passage of the tubular drainage-shaft O and a series of axial vents e 6, (see Fig. 4,) one of which will recei-ve the feather or spline upon the shaft, while the others serve as drainage-vents. These vents e e are located to correspond with the vents d of the filter-drums and, in conjunction withthe elongated slots 0 c of the drainage tube or shaft 0, insure a free vent for the filtered fluid from the interior of the filterdrums without the necessity of locating the filter-drums directly over the slots of the drainage tube or shaft 0.

F F indicate washers or gaskets which are interposed between the spools E and the filter-drums D .to insure a tight joint, and F the washer or packing between the last filterdrum and the nut 0 which confines the filter-drums on the slotted tubular drainageshaft C.

G G indicate the heads of the reticulated rotatable drum which incloses the filter-d ru ms and drainage-shaft within the filter-casing, the cylinder or shell Gof said drum being of perforated metal, if desired, but preferably of screen-wire of such mesh as will prevent the escape of the grauular cleaning material contained therein. The reticulated shell Gr may be provided with a detachable section, if desired, for the in troduction and removal of the cleansing material, or the material may be introduced through the head of the cylinder before closing the same, if preferred.

H indicates the granular cleaning material contained within the reticulated drum G in contact with the filter-drums D, and said material may be of any suitable character,

ground carbon, not only for its filtering effect, but because when the filter-drum or filter-disks are of hard-burned carbon there will be a minimum amount of wear in cleaning the filtering-surfaces.

In setting up the'filter one head G, carrying the reticulated drum G, is slipped over the tubular drainage-shaft O, as indicated in Fig. 2, and is pressed against the collar 0', after which a washer F and spool E or spacer are threaded on the shaft, and next a filterdrum D, (which is composed of the two filterdisks d d, sealed at their periphery by the packing r and band R,) after which a second washer F and spool E are strung on the shaft C, and so on until the desired number of filtering-drums have been added and the shaft filled, when the washer F is applied and the nut screwed home to secure the parts and obtain a water-tight joint between the filterdrums and between said drums and the shaft. The spline or feather 0 will cause the several filter-drums and reticulated drum to rotate with the shaft 0, on which they are mounted. The granularmaterial H may be introduced into the reticulated drum G and the second head Gafterward inserted and secured. One head B of the casing H having been removed, the reticulated drum, inclosed granular material,and filter-drums, with the tubular shaft carrying the same, may be inof said tubular drainage-shaft C projecting through the stufling-boxes b b in the heads B B of said filter-casing A.

The filter hereinbefore described will operate as follows: Water or other fluid to be filtered beingadmitted under pressure through supply-pipe A and leader a will enter the filter-casing A through the series of perforations at and rise through the reticulated drum G and contained granular material Haround the filter-drums D, where the coarser impurities will be arrested. The fluid will pass thence through the filter-disks d d, (filterdrums D,) gathering in the interior of said drums D, whence it will flow through vents d e and slots 0 into the tubular drainageshaft 0, by which through swivel-elbows C it may be delivered into any suitable receptacle provided therefor.

When it becomes necessary to cleanse the surface of the filtering-drums D D, the valve in flush-pipe A is opened and the tubular drainage-shaft O is rotated, carrying with it the attached filter-drums D D and the reticulated drum G, which causes the contained granular material H to tumble the surface of filter-drums D D-that is to say, the granular matter H will have a sliding rolling motion within itself and over the surfaces of the filter-drums, which will eifectually free the surfaces of the plates and the mass of granular material of the foreign matter which is carried out of the filter-casing through flush-pipe A by the flow of the fluid.

Among the advantages arising from my invention are the facility with which the filterdrums and cleansing material can be removed from the filter-casing when necessary, the ability to use a minimum thickness of filterdisks, whereby a maximum filtering-surface is obtained within a small compass, and a correspondingly-increased volume of filtered fluid for a filter of any given dimensions.

Having thus described my invention, what Iclaim, and desire to secure by Letters Patent, is

1. In a filter, the combination of a shaft, a plurality of filter-drums and an inclosing reticulated rotatable drum adapted to contain cleaning material for the filter-drums, substantially as and for the purposes specified.

2. In a filter, the combination ofa perforate tubular shaft, filter-drums mounted thereon, and a reticulated drum also mounted on and movable with the shaft and which incloses the filter-drums, substantiallyas' and for the purposes specified.

3. In a filter, the combination with a tubular shaft having elongated slots therein, of a filter-drum having an opening for the reception of the tubular shaft said opening provided with vents, substantially as and for the purposes specified.

t. In a filter, the combination with a tubular shaft having elongated slots therein, of a plurality of filter-drums having shaft-openings provided with vents, and spacing-spools having shaft-openings provided with Vents, substantially as and for the purposes specified.

5. In a filter, the combination with a perforated tubular shaft having a spline or feather, of a plurality of filter-drums each having a shaft-opening provided with vents, interposed spacing-spools having shaft-openings provided with vents, and means for confining said filter-drums and spools on the shaft, substantially as and for the purposes specified.

6. A filter-drum, comprised of two filterdisks having abutting projections on their apposite faces, and a gasket and band which confine and seal said disks at their peripheries, substantially as and for the purposes specified.

7. A filter-drum comprised of a plurality of filter-disks each having a peripheral flange and a series of contacting projections upon the apposite faces of the disks, substantially as and for the purposes specified.

In testimony whereof I affix my signature, in presence of two witnesses, this 27th day of March, 1900.

THEODORE J. ZOELLER.

Witnesses:

JNo. WADE, W. A. BUMSON. 

